Muwatta Imam Malik Book of Purity, Hadith 86
Yahya related to me from Malik from Ibn Shihab from Urwa ibn az- Zubayr that Umm Sulayman said to the Messenger of Allah ﷺ "Should a woman do ghusl when she experiences the same as a man in her sleep?" The Messenger of Al lah said to her, "Yes, she should do ghusl. "A'isha said to her, "Shame on you! Does a woman see that?" (i.e. a liquid.) The Messenger of Allah ﷺ said to her, "May your right hand be full of dust. From where does family resemblance come?"
حَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ بْنِ الزُّبَيْرِ، أَنَّ أُمَّ سُلَيْمٍ، قَالَتْ لِرَسُولِ اللَّهِ ﷺ الْمَرْأَةُ تَرَى فِي الْمَنَامِ مِثْلَ مَا يَرَى الرَّجُلُ أَتَغْتَسِلُ فَقَالَ لَهَا رَسُولُ اللَّهِ ﷺ " نَعَمْ فَلْتَغْتَسِلْ " . فَقَالَتْ لَهَا عَائِشَةُ أُفٍّ لَكِ وَهَلْ تَرَى ذَلِكَ الْمَرْأَةُ فَقَالَ لَهَا رَسُولُ اللَّهِ ﷺ " تَرِبَتْ يَمِينُكِ وَمِنْ أَيْنَ يَكُونُ الشَّبَهُ " .